31．Either you or on of your students________to attend the meeting that is due tomorrow.
| A．are | B．is | C．have | D．Be |
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--- Bob，are you free at the moment？I have to ask you some questions.
--- _______.
| A．It’s a pleasure | B．Ask，please |
| C．Help yourself | D．Yes，go ahead |
He appeared __________with our team's performance.
| A．satisfying | B．to be satisfying |
| C．to satisfy | D．satisfied |
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